Measuring isospin mixing in 36Ar using a polarized, neutral atom trap

D. Melconian*, D. Ashery, G. Ball, J. A. Behr, P. Bricault, B. A. Brown, M. Dombsky, K. P. Jackson, S. Fostner, A. Gorelov, M. N. Groves, S. Gu, M. R. Pearson, I. S. Towner, M. Trinczek, I. Vollrath

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Magneto-optical traps provide a cold, compact cloud of radioactive atoms and therefore are an ideal source for use in precision nuclear β decay studies. Optical pumping techniques can add a new dimension to such experiments by efficiently polarizing these samples to ≳99%. TRIUMF's experiment E925 is utilizing these techniques to prepare to measure the isospin mixing between the first two Iπ=2+ excited states of 36Ar with the lowest 2+, T=1 isobaric analog state. The spin-polarized 36K β+ decay observables will be measured using TRIUMF's neutral atom trap at ISAC, TRIUMF's isotope separator and accelerator facility. The main purpose is to test isospin mixing models in the s,d-shell needed for determination of the superallowed Fermi strength in 0+→0+ decays.

Original languageEnglish
Pages (from-to)540-543
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
StatePublished - May 2003
EventEMIS-14 - Victoria, BC, Canada
Duration: 5 Jun 200210 Jun 2002


  • Isospin mixing
  • Magneto-optic trap
  • Nuclear β decay
  • Polarization


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